[rbuergi]

Found while preparing the build hosts' enable. The chart's default buildHosts.nodeSelector was workload: cibuild, and no node carries that label. The CI node pools (cibuildv6, cidind) are labelled workload: ci-build, which is also what the ARC runners select (deployments/aks/ci-runners/arc-runner-scale-set-values.yaml in the estate repo). Every build-host pod would therefore have stayed Pending. The tolerations (ci=build, spot) already match.

• deploy/helm/values.yaml: the default is now workload: ci-build.
• deploy/aks/scripts/test-build-hosts.sh pins the real label. It passes, and with the old label it fails (exit 1).

Nothing runs build hosts yet (buildHosts.enabled: false everywhere), so this changes no running workload.

🤖 Generated with Claude Code

[Copilot]

🟢 Approval recommended

The narrow selector correction is covered by the updated regression assertion and does not enable workloads.

No open issues 🎉

What changed in this PR

Corrects the build-host Helm default to match the CI node pools’ label, preventing unschedulable pods when build hosts are enabled.

Changes:

• Changes the node selector from workload: cibuild to workload: ci-build.
• Updates the regression assertion and diagnostic to require the corrected label.
• Leaves build hosts disabled by default and tolerations unchanged.

File	Description
deploy/​helm/​values.yaml	Corrects the build-host node selector.
deploy/​aks/​scripts/​test-build-hosts.sh	Updates the selector assertion, diagnostic, and explanatory comment.

_{Review effort: Balanced}

[github-actions]

Test Results

    31 files  ±0      31 suites  ±0   1h 8m 56s ⏱️ +54s
14 609 tests ±0  14 412 ✅ ±0  197 💤 ±0  0 ❌ ±0 
14 639 runs  ±0  14 442 ✅ ±0  197 💤 ±0  0 ❌ ±0 

Results for commit fb26a17. ± Comparison against base commit 19ac9a0.

This pull request removes 44 and adds 18 tests. Note that renamed tests count towards both.

   --- End of inner exception stack trace ---
   --- End of inner exception stack trace ---)
   --- End of inner exception stack trace ---, expected: True)
   --- End of inner exception stack trace ---, isDenial: True)
 ---> (Inner Exception #1) MeshWeaver.Mesh.QueryProviderStalledException: Query provider(s) [pg] did not emit an Initial within the query fan-in's 16s bound for query 'nodeType:NodeType' (user 'system'). The merged Initial gates on EVERY provider, so this query has NO snapshot to answer with — it is reported as unavailable (retryable) rather than left hanging with no error. This is an availability failure, never a permission verdict: a consumer deciding access must fail CLOSED and say it could not establish the answer. Fix the stalled provider; never bump the consumer's timeout.<---
 ---> (Inner Exception #1) MeshWeaver.Messaging.Hub.Test.InfrastructureFaultTest+ProviderException (0x80004005): Failed to connect to 10.42.18.4:5432<---
 ---> (Inner Exception #1) System.ArgumentException: Value does not fall within the expected range.<---
 ---> (Inner Exception #1) System.InvalidOperationException: boom<---
 ---> (Inner Exception #1) System.InvalidOperationException: source B is misconfigured<---
…

Memex.Portal.Shared.Test.InstanceIdRulesMatchTheRegistryTest ‑ TheSetupHostAgreesWithTheRegistry(candidate: "f2ab9163-db9d-4da1-a28d-2c94a5880105")
Memex.Portal.Shared.Test.PublishStorageFaultIsNotAConflictTest ‑ AStorageFault_IsA500_NamingTheError(fault: System.AggregateException: One or more errors occurred. (Access to the path '/data/modules/activation.d/MeshWeaver.Markdown.Export.json' is denied.)
 ---> System.UnauthorizedAccessException: Access to the path '/data/modules/activation.d/MeshWeaver.Markdown.Export.json' is denied.
   --- End of inner exception stack trace ---)
Memex.Portal.Shared.Test.PublishStorageFaultIsNotAConflictTest ‑ AStorageFault_IsA500_NamingTheError(fault: System.InvalidOperationException: landing faulted
 ---> System.UnauthorizedAccessException: Access to the path '/data/modules/activation.d/MeshWeaver.Markdown.Export.json' is denied.
   --- End of inner exception stack trace ---)
Memex.Portal.Shared.Test.SessionDenialIsAnAnswerTest ‑ OnlyAVerdictReadsAsADenial(shape: "the same verdict nested, as a late denial dispatch"···, failure: System.InvalidOperationException: write failed
 ---> System.UnauthorizedAccessException: Access denied
   --- End of inner exception stack trace ---, isDenial: True)
MeshWeaver.Compiler.Pipeline.Test.SourcesWatcherStallBackoffTest ‑ The_production_classifier_recognises_a_stall_through_every_wrapping(because: "a stall as an aggregate's FIRST member", fault: System.AggregateException: One or more errors occurred. (Query provider(s) [pg] did not emit an Initial within the query fan-in's 16s bound for query 'nodeType:NodeType' (user 'system'). The merged Initial gates on EVERY provider, so this query has NO snapshot to answer with — it is reported as unavailable (retryable) rather than left hanging with no error. This is an availability failure, never a permission verdict: a consumer deciding access must fail CLOSED and say it could not establish the answer. Fix the stalled provider; never bump the consumer's timeout.)
 ---> MeshWeaver.Mesh.QueryProviderStalledException: Query provider(s) [pg] did not emit an Initial within the query fan-in's 16s bound for query 'nodeType:NodeType' (user 'system'). The merged Initial gates on EVERY provider, so this query has NO snapshot to answer with — it is reported as unavailable (retryable) rather than left hanging with no error. This is an availability failure, never a permission verdict: a consumer deciding access must fail CLOSED and say it could not establish the answer. Fix the stalled provider; never bump the consumer's timeout.
   --- End of inner exception stack trace ---, expected: True)
MeshWeaver.Compiler.Pipeline.Test.SourcesWatcherStallBackoffTest ‑ The_production_classifier_recognises_a_stall_through_every_wrapping(because: "a stall as an aggregate's SECOND member", fault: System.AggregateException: One or more errors occurred. (The operation has timed out.) (Query provider(s) [pg] did not emit an Initial within the query fan-in's 16s bound for query 'nodeType:NodeType' (user 'system'). The merged Initial gates on EVERY provider, so this query has NO snapshot to answer with — it is reported as unavailable (retryable) rather than left hanging with no error. This is an availability failure, never a permission verdict: a consumer deciding access must fail CLOSED and say it could not establish the answer. Fix the stalled provider; never bump the consumer's timeout.)
 ---> System.TimeoutException: The operation has timed out.
   --- End of inner exception stack trace ---
 ---> (Inner Exception #1) MeshWeaver.Mesh.QueryProviderStalledException: Query provider(s) [pg] did not emit an Initial within the query fan-in's 16s bound for query 'nodeType:NodeType' (user 'system'). The merged Initial gates on EVERY provider, so this query has NO snapshot to answer with — it is reported as unavailable (retryable) rather than left hanging with no error. This is an availability failure, never a permission verdict: a consumer deciding access must fail CLOSED and say it could not establish the answer. Fix the stalled provider; never bump the consumer's timeout.<---
, expected: True)
MeshWeaver.Compiler.Pipeline.Test.SourcesWatcherStallBackoffTest ‑ The_production_classifier_recognises_a_stall_through_every_wrapping(because: "a stall nested in an aggregate inside a wrapper", fault: System.InvalidOperationException: outer
 ---> System.AggregateException: One or more errors occurred. (Value does not fall within the expected range.) (Query provider(s) [pg] did not emit an Initial within the query fan-in's 16s bound for query 'nodeType:NodeType' (user 'system'). The merged Initial gates on EVERY provider, so this query has NO snapshot to answer with — it is reported as unavailable (retryable) rather than left hanging with no error. This is an availability failure, never a permission verdict: a consumer deciding access must fail CLOSED and say it could not establish the answer. Fix the stalled provider; never bump the consumer's timeout.)
 ---> System.ArgumentException: Value does not fall within the expected range.
   --- End of inner exception stack trace ---
 ---> (Inner Exception #1) MeshWeaver.Mesh.QueryProviderStalledException: Query provider(s) [pg] did not emit an Initial within the query fan-in's 16s bound for query 'nodeType:NodeType' (user 'system'). The merged Initial gates on EVERY provider, so this query has NO snapshot to answer with — it is reported as unavailable (retryable) rather than left hanging with no error. This is an availability failure, never a permission verdict: a consumer deciding access must fail CLOSED and say it could not establish the answer. Fix the stalled provider; never bump the consumer's timeout.<---

   --- End of inner exception stack trace ---, expected: True)
MeshWeaver.Compiler.Pipeline.Test.SourcesWatcherStallBackoffTest ‑ The_production_classifier_recognises_a_stall_through_every_wrapping(because: "a stall wrapped as InnerException", fault: System.InvalidOperationException: outer
 ---> MeshWeaver.Mesh.QueryProviderStalledException: Query provider(s) [pg] did not emit an Initial within the query fan-in's 16s bound for query 'nodeType:NodeType' (user 'system'). The merged Initial gates on EVERY provider, so this query has NO snapshot to answer with — it is reported as unavailable (retryable) rather than left hanging with no error. This is an availability failure, never a permission verdict: a consumer deciding access must fail CLOSED and say it could not establish the answer. Fix the stalled provider; never bump the consumer's timeout.
   --- End of inner exception stack trace ---, expected: True)
MeshWeaver.Compiler.Pipeline.Test.SourcesWatcherStallBackoffTest ‑ The_production_classifier_recognises_a_stall_through_every_wrapping(because: "an aggregate of unrelated faults", fault: System.AggregateException: One or more errors occurred. (The operation has timed out.) (Value does not fall within the expected range.)
 ---> System.TimeoutException: The operation has timed out.
   --- End of inner exception stack trace ---
 ---> (Inner Exception #1) System.ArgumentException: Value does not fall within the expected range.<---
, expected: False)
MeshWeaver.Messaging.Hub.Test.InfrastructureFaultTest ‑ Classifies(shape: "a MIXED aggregate — one transient branch, one genu"···, exception: System.AggregateException: One or more errors occurred. (Failed to connect to 10.42.18.4:5432) (source B is misconfigured)
 ---> MeshWeaver.Messaging.Hub.Test.InfrastructureFaultTest+ProviderException (0x80004005): Failed to connect to 10.42.18.4:5432
   --- End of inner exception stack trace ---
 ---> (Inner Exception #1) System.InvalidOperationException: source B is misconfigured<---
, expected: False)
…